Pneumatic stacker.



N0. 638,l9l. PatentedNov. 28, I899. J. A. WALSH.

PNEUMATIC STACKER.

(Application filqi Feb. 16, 1899.)

(No Model.) 2 SheetsSheet I.

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No. 638,|9l. Patented Nov. 28, I899. J. A. WALSH. PNEUMATIC STAGKEB.

(Application filed Feb. 16, 1899.)

2 Sheets-Shea! 2.

(No Model.)

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JAMES A. WVALSIL OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE INDIANAMANUFACTURING COMPANY, OF SAME PLACE.

PNEUMATIC STACKER.

SPECIFICATION forming part of Letters Patent No. 638,191, dated November28, 1899.

Application filed February 16, 1899. Serial No. 705,598. (No model.)

To coZZ whom it may concern:

Be it known that I, JAMES A. WALSH, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of 5Indiana, have invented certain new and useful Improvements in PneumaticStackers, of which the following is a specification.

It sometimes happens in the threshing of grain, especially where thestraw is slightly damp or tough, that some of the kernels will not befully separated by the action of the threshing-machine and will pass onout with the straw. \Vhere that class of straw-delivering devices knownas pneumatic strawi stackers are employed, especially that variety wherethe straw is passed through a fan on its way to the discharging ordelivery point, some of the grains which adhere to the straw under theabove conditions are dis- 2o lodged, but there has heretofore been noway of saving them, and they have instead been passed on out with thestraw into the strawstack.

The object of my present invention is to provide a means by which suchdislodged grain or any grain which may by any other means, accidental orotherwise, continue on with the straw into the straw-stack may be saved;and it consists in the application of 3b a screen to some convenientportion of the straw-stacker structure, through which such grain mayfall and be separated from the straw and then conducted back and discharged at some appropriate point.

In the construction of an apparatus embodying my invention I have placedthis screen within the bottom of the trunk or chute of the straw-stackerbut it may obviously be placed at any point desired.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figure1 is a view of the rear portion of a threshing-machine with a pneumaticstraw-stacker attached thereto, my invention being embodied therein.Fig. 2 is a longitudinal sectional view, as seen from the dotted line 22 in Fig. 3, of a fragment of the trunk or chute of a pneumaticstraw-stacker provided with a screen in its bottom side arranged in amanner adopted by me in carrying out my invention; Fig. 3, a horizontalsectional view as seen when looking downwardly from the dotted line 3 3in Fig. 2; Fig. 4, a transverse sectional view on the dot- 5 5 ted line4: at in Fig. 2; and Fig. 5, a detail fragmentary sectional view similarto a portion of Fig. 2, but on a much-enlarged scale.

In said drawings the portions marked A represent the fan-housing of apneumatic 6o straw-stacker, B the trunk or chute of a pneumaticstraw-stacker as the same is ordinarily constructed,and C a screenappropriate to the carrying out of my invention.

The fan-housing A and trunk or chute B are or may be of any ordinary ordesired form or construction. The exit I) for the saved grain is in theconstruction shown placed at or near its lower end just underthe rearportion of the screen.

The screen C may be of any form desired.

I have shown it as constructed of sheet metal crimped transversely atintervals, iving it substantially a saw-tooth form, with the openingsthrough which the grain in being saved is to pass at or near the lowestpoints or within the throats of the teeth. While, as above stated, suchscreens may be made in any form desired, I consider that the particularform shown has some special advantages. The straw in being projectedthrough a pneumatic straw-stacker is driven with considerable force andat a considerable speed. A screen having the form shown presents asubstantially smooth surface for the straw to pass over and providesrecesses into which the grain may fall and which protect whatever fallstherein against the force of the blast of air. An ordinary wire screenmight be used for this purpose and in my opinion would prove reasonablyeffective; but grain which fell thereon would to some degree be subjectto the force of the blast of air, and some portion of it might possiblybe carried outwith the straw instead of passing 5 through to below thescreen. Then, too, such meshes are apt to permit some portion of theforce of the air-blast through them and possibly prevent the grain fromsliding back to the point of exit andare also liable to catch shortstraws or the ends of straws, while a screen of the form shown is smoothon those portions with which the straw comes in contact and its pocketsor depressions create little eddies in the air-current, which facilitatethe deposit of the loose grains. For the reasons given, therefore, Iprefer a screen constructed as shown and described, although I do notdesire to be understood as limiting myself to any particular form,arrangement, or position of the screen.

Having thus fully described my said in vention, what I claim as new, anddesire to secure by Letters Patent, is

1. Thecon1bination,with thetrunkorchute of a pneumatic straw-stacker, ofa horizontal screen positioned within said trunk or chute and fixedlysecured thereto just above the bottom thereof, said screen beingcomposed of sheet metal crimped transversely into a saw-tooth form, withperforations at the lower points of the resulting pockets, substantiallyas shown and described and for the purposes set forth.

2. The combination,with the trunk or chute of a pneumatic straw-stacker,of a horizontal sheet-metal screen arranged therein and fixedly attachedthereto just above the lower side thereof, said screen being formed withpockets produced by crimping the metal into saw-tooth form, said pocketshaving perforations therein at the lowest points below the overhangingupperpoints, substantially as set forth.

3. The combination,with the trunk or chute of a pneumatic straw-stacker,of a screen therein for the purpose of separating grain from the strawpassing over the same, said screen being formed with pockets into whichthe grain is adapted to fall, and said pockets having perforations atthe lower points through which the grain may pass, said screen beingfixedly attached to and Within the conveyer trunk or chute beginning ator near the lower end and extending a suitable distance upwardly alongthe same, the trunk or chute having a suitable outlet from below saidscreen through which the saved grain may be discharged, the whole'beingconstructed, arranged and operating substantially as set forth.

In Witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 11th day of February, A. D. 1899.

JAMES A. WALSH.

WVitnesses:

CHESTER BRADFORD, O. S. FRYE.

